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Optics and Spectroscopy

Optical data transfer by switching waves in bistable interferometers with a specified optical thickness distribution

А. М. Гончаренко, George V. Sinitsyn, A. V. Lyakhnovich, Sergey P. Apanasevich

Published Sep 1, 2009• 0 citations

Abstract

The evolution of switching wave fronts in thin-layer bistable Fabry-Perot interferometers with a specified topology of the transverse distribution of the optical thickness of an intermediate layer is studied. The conditions of passage of switching waves through the boundary between regions with different thicknesses and of tunneling of waves through a barrier of a variable thickness and width formed by two such boundaries are determined by numerical modeling. The possibilities of the formation of planar waveguide channels, regions of retardation and acceleration of the motion of switching waves, and points of the splitting and joining of their fronts are demonstrated, as well as the possibility of creating planar structures on this basis that can perform optical logic operations.

DOI: 10.1134/s0030400x09090148

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The evolution of switching wave fronts in thin-layer bistable Fabry-Perot interferometers with a specified topology of the transverse distribution of the optical thickness of an intermediate layer is studied. The conditions of passage of switching waves through the boundary between regions with different thicknesses and of tunneling of waves through a barrier of a variable thickness and width formed by two such boundaries are determined by numerical modeling. The possibilities of the formation of planar waveguide channels, regions of retardation and acceleration of the motion of switching waves, and points of the splitting and joining of their fronts are demonstrated, as well as the possibility of creating planar structures on this basis that can perform optical logic operations.

The possibility of using bistable nonlinear Fabry–Perot interferometers as wide-band data transparent all-optical spatial switches has been investigated. It has been shown that three such devices, switching between transmitting and reflecting states, can form a 1×4 optical routing network: controlled purely by coded header pulses, preceding the data stream. The prospects for developing the performance of switches of this type towards the level required in practical telecommunications systems are discussed.

Specific features of the light-beam transverse structure transformation in the process of four-wave coupling in the Fabry-Perot interferometer with a resonant nonlinearity under conditions of bifurcation of the symmetry breaking and optical bistability are analyzed. The asymmetric regimes of the interaction, characterized by a difference both in the integrated transmission functions of the nonlinear interferometer for two light beams with equal intensities and in the spatial intensity distribution at the exit of the interferometer, are considered.

The phenomenon of optical bistability (OB), including the so-called transverse effects in distributed OB-systems, offers additional opportunities for development of new architecture designs in optical systems of information processing and communications. In particular, this contribution deals with a class of all-optical multiplexers/demultiplexers (MDM) for data redirecting and processing in the nodes of fiber-optical communication channels and networks. Their specific features are dynamic connection remapping and the possibility of applying WDM/DWDM techniques. As switching elements optically nonlinear and bistable thin-film Fabry-Perot interferometers (TFI) are used. Thus the developed MDM are capable of operating at several wavelengths that correspond to the carrier frequency set of working bands of WDM/DWDM systems.